Examination of the Biological Role of the α(2→6)-Linked Sialic Acid in Gangliosides Binding to the Myelin-Associated Glycoprotein (MAG)
摘要:
The tetrasaccharide 1, a substructure of ganglioside GQ1b alpha, shows a remarkable affinity for the myelin-associated glycoprotein (MAG) and was therefore selected as starting point for a lead optimization program. In our search for structurally simplified and pharmacokinetically improved mimics of 1, modifications of the core disaccharide, the alpha(2 -> 3)- and the alpha(2 -> 6)-linked sialic acid were synthesized. Biphenylmethyl and (S)-lactate were identified as suitable replacements for the alpha(2 -> 6)-linked sialic acid. Combined with a core modification and the earlier found aryl amide substituent in the 9-position of the alpha(2 -> 3)-linked sialic acid, high affinity MAG antagonists were identified. All mimics were tested in a competitive target-based binding assay, providing relative inhibitory potencies (rlP). Compared to the reference tetrasaccharide 1, the rIPs of the most potent antagonists 59 and 60 are enhanced nearly 400-fold. Their K(D)s determined in surface plasmon resonance experiments are in the low micromolar range. These results are in semiquantitative agreement with molecular modeling studies. This new class of glycomimetics will allow to validate the role of MAG in the axon regeneration process.
PRETARGETING KIT FOR IMAGING OR THERAPY COMPRISING A TRANS-CYCLOOCTENE DIENOPHILE AND A DIENE
申请人:Tagworks Pharmaceuticals B.V.
公开号:EP2707035B1
公开(公告)日:2020-04-01
EP3936151A1
申请人:——
公开号:EP3936151A1
公开(公告)日:2022-01-12
US9913921B2
申请人:——
公开号:US9913921B2
公开(公告)日:2018-03-13
[EN] THERAPEUTIC METHODS FOR TREATING HEPATITIS B<br/>[FR] MÉTHODES THÉRAPEUTIQUES DE TRAITEMENT DE L'HÉPATITE B
申请人:ARBUTUS BIOPHARMA CORP
公开号:WO2020191207A1
公开(公告)日:2020-09-24
The invention provides therapeutic combinations and therapeutic methods that are useful for treating Hepatitis B and Hepatitis D.
[EN] INTRACELLULAR RETENTIVE FLUORESCENT COMPOUND, AND CELL STAINING METHOD AND HIGH-SENSITIVITY CELL DETECTION METHOD EACH USING SAME<br/>[FR] COMPOSÉ FLUORESCENT À RÉTENTION INTRACELLULAIRE ET PROCÉDÉ DE COLORATION DE CELLULES ET PROCÉDÉ DE DÉTECTION DE CELLULES À HAUTE SENSIBILITÉ L'UTILISANT<br/>[JA] 細胞滞留性蛍光化合物並びにそれを用いた細胞の染色方法及び高感度検出方法